抄録
Platinum (Pt) nanodots were prepared by applying a heating process to organometallic solutions containing different concentrations of Pt. We investigated how size and crystallinity of Pt nanodots depend on the concentration of Pt in the organometallic solution. The average diameter of Pt nanodots was found to depend on Pt content, and Pt nanodots with a minimum diameter of 33 nm were obtained using a solution containing 2.4% Pt. However, the crystallinity of Pt nanodots was hardly affected by Pt content; all Pt nanodots prepared in this study had high crystallinity. The Pt content was controlled by the dilution ratio between the organometallic and dilute solutions. Therefore, solutions with low viscosity spread thinly and evenly on a substrate, compared to solutions with high viscosity. In addition, we calculated the volumes of individual Pt nanodots using three-dimensional scanning electron microscopy and image processing.
